Supplementary Data 1 of the manuscript "Unexpected Abundance of Cable Bacteria in Deep Anoxic Sediment Reveals a Novel BiogeochemicalNiche". Data with raw library statistics, FastQC (after preprocessing), and FLASH (merging paired-end sequences) results of the 36 metatranscriptomic libraries from Koljö Fjord and Kristineberg Bay (West Sweden) and the Nearshore and Offshore stations from Tvärminne Archipelago (South Finland).